Persona 3 FES, rush each block of Tartarus, then hyperfocus on the social sim side of the game for the next in-game month. Rinse and repeat.
Final Fantasy XII, go out of my way to powerlevel, but then mix up multiple powerleveling methods in one. Also spending an excessive amount of time reading the in-game lore and accidentally triggering the eternal delay glitch in the game by trying an unrelated cheese against a superboss.